//
public class test {
    //
    public static void main(String[] args) {
        String abc = "abc";
        System.out.println(abc);
        int[]arr = {1,2,3,4,5,6,7,8,9};
        for (int i = 0; i < arr.length; i++) {

        }
        for (int i = arr.length - 1; i >= 0; i--) {

        }
        for (int i : arr) {
            System.out.println(i);
        }
        int num = 0;
        boolean b = true;
        if (num>0) {

        }
        return b;
        String ac = null;
        if (ac == null) {

        }
        if (ac != null) {

        }


    }

}
